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rainier ambi

  1. Rainier Ambi Charging Handle on M400

    SIG Sauer Rifles
    One of my first searches on this site, was for "Rainier" and I didn't find anything. I have seen little info on this online, maybe a few blogs or M400 builds on other forums. Manuf website states: "May not fit on some SIG AR’s, specifically the 516 Model" Well here it is on the M400. Sorry...
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